• Proceedings of the KOSOMBE Conference
• /
• v.1996 no.11
• /
• pp.335-336
• /
• 1996

Flexible, self-expanding metallic stent were developed using igzag wire bend and segmented polyurethane. Mechanical properties of these stents were tested using INSTRON. These stents were used for palliative treatment of mallignant esophagogastric strictures(3 case) and bawl preparation of collorectal obstruction(10 case). All stents were inserted with fluoroscopic guidance without techinal failures. According to the results, these stents are easy to insert, safe, and very effective for dilation of strictures in curved GI tract.

• Journal of the Korean School Mathematics Society
• /
• v.2 no.1
• /
• pp.105-120
• /
• 1999

This paper is guided for school mathematics education with Excel software. Many application of Excel to mathematics education are increasing the interesting of students. We introduce and discuss the using method of Excel in teaching with computer softwares.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.35 no.5B
• /
• pp.785-793
• /
• 2010

The current excessive limitations to mobile RFID tags and readers make it impossible to apply present codes and protocols. The technology for information and privacy protection should be developed in terms of general interconnection among elements and their characteristics of mobile RFID in order to such technology that meets the RFID circumstances. In this paper, transplanting and extending security library for protecting mobile RFID information in secure mobile RFID terminal S/W platform system to support security application on the path of all data from RFID reader to application server.

• Proceedings of the KIPE Conference
• /
• 2006.06a
• /
• pp.561-563
• /
• 2006

This paper summarizes the results of these efforts by offering the PV generation system with solar tracking. The status of PV generation system with solar tracking components and interconnection and effects are semmarized. Hence this paper duscusses only points that might be useful for application.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1988.02a
• /
• pp.34-35
• /
• 1988

• Journal of the Korean Society for Precision Engineering
• /
• v.16 no.9
• /
• pp.25-34
• /
• 1999

In spite of the advance of 3D solid modeling technology, there are some distinct areas where 2D CAD S/W are still dominant, and more competent comparing with 3D CAD S/W. For example, in the manufacturing of 2D-shaped electrical parts, most related manufacturing tools have 2D geometric features by nature, and 3D solid models applied to these parts have substantial overheads. Nevertheless, most 2D CAD S/W have no topological inquiry services because they have no such information on their geometrical database inherently. Thus, it is needed to extract such information from 2D CAD database for developing more advanced application such as automated drafting/design S/W. In this paper, the extraction of topological information from 2D CAD has been performed in general way using concept of B-rep. A general extraction algorithm, data structure and meta file format for 2D topological object have been developed and successfully applied to the development of the automated lead frame die design system in Samsung Aerospace. it is also possible to provide a flexible, powerful topology-oriented functionality on any common 2D CAD S/W.

• Korean Journal of Poultry Science
• /
• v.28 no.2
• /
• pp.107-123
• /
• 2001

• 한국정보디스플레이학회:학술대회논문집
• /
• 2007.08b
• /
• pp.1220-1224
• /
• 2007

The effects of plasma damages to the organic thin film transistor (OTFT) during the fabrication process are investigated; metal deposition process on the organic gate insulator by plasma sputtering mainly generates the process induced damages of bottom contact structured OTFTs. For this study, various deposition methods (thermal evaporation, plasma sputtering, and neutral beam based sputtering) and metals (gold and Indium-Tin Oxide) have been tested for their damage effects onto the Poly 4-vinylphenol(PVP) layer surface as an organic gate insulator. The surface damages are estimated by measuring surface energies and grain shapes of organic semiconductor on the gate insulator. Unlike thermal evaporation and neutral beam based sputtering, conventional plasma sputtering process induces serious damages onto the organic surface as increasing surface energy, decreasing grain sizes, and degrading TFT performance.

• 제어로봇시스템학회:학술대회논문집
• /
• 2004.08a
• /
• pp.1655-1658
• /
• 2004

In this paper, we design and implement remote servo motor control system with real-time micro embedded operating system. The system, where controller and camera image grabber are mounted, handles control commands transmitted from a remote PC web browser. A hard real-time servo motor driver running on the real-time micro embedded OS and then a digital control application which confirms precise sampling time intervals is constructed. Frame grabber images transmitted from camera are saved in a image data format to view on remote PC web browser.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2010.05a
• /
• pp.499-500
• /
• 2010